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BOSTON MARATHON 2025

Brian Guglielmo

Bib: 29141•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 36%
Gender (Male)
#0 / 16105
Top 49%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:38/mi
23:44
↑ 97↓ 3451.5%
10K· 6.21 mi
7:25/mi
46:48
↑ 79↓ 1380.4%
15K· 9.32 mi
7:29/mi
1:10:04
↑ 67↓ 78
20K· 12.43 mi
7:30/mi
1:33:23
↑ 106↓ 860.1%
Half· 13.11 mi
7:24/mi
1:38:26
↑ 19↓ 370.5%
25K· 15.53 mi
7:38/mi
1:56:57
↑ 66↓ 880.2%
30K· 18.64 mi
7:52/mi
2:21:24
↑ 181↓ 1480.2%
20M
8:30/mi
2:32:57
↑ 64↓ 500.2%
21M
8:04/mi
2:41:01
↑ 106↓ 241.6%
35K· 21.75 mi
7:25/mi
2:46:34
↑ 17↓ 861.7%
23M
7:37/mi
2:56:06
↑ 23↓ 630.6%
24M
7:29/mi
3:03:35
↓ 821.3%
40K· 24.85 mi
7:29/mi
3:09:59
↓ 200.3%
25.2M
8:10/mi
3:12:48
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:20:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:26
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:41:57
Pace7:47 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:41:3523:447:3823:44
7:38
-
10K
6.21 mi12:04:3946:487:3223:04
7:25
-0:13
15K
9.32 mi12:27:551:10:047:3123:16
7:29
+0:04
20K
12.43 mi12:51:141:33:237:3123:19
7:30
+0:01
Half
13.11 mi12:56:171:38:267:315:03
7:24
-0:06
25K
15.53 mi13:14:481:56:577:3218:31
7:38
+0:14
30K
18.64 mi13:39:152:21:247:3524:27
7:52
+0:14
20M
20.00 mi13:50:482:32:577:3911:33
8:30
+0:38
21M
21.00 mi13:58:522:41:017:408:04
8:04
-0:26
35K
21.75 mi14:04:252:46:347:405:33
7:25
-0:39
23M
23.00 mi14:13:572:56:067:399:32
7:37
+0:12
24M
24.00 mi14:21:263:03:357:397:29
7:29
-0:08
40K
24.85 mi14:27:503:09:597:396:24
7:29
0:00
25.2M
25.20 mi14:30:393:12:487:392:49
8:10
+0:41
Finish
26.22 mi14:38:143:20:237:397:35
7:26
-0:44

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:24 /mi

Average Pace

7:39 /mi

Slowest Pace

8:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:01

93% of race

Time at Steady Pace

14:22

7% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:39 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:41:3523:447:3823:44
7:38
#13410
10K
6.21 mi12:04:3946:487:3223:04
7:25
#12407
15K
9.32 mi12:27:551:10:047:3123:16
7:29
#12135
20K
12.43 mi12:51:141:33:237:3123:19
7:30
#11758
Half
13.11 mi12:56:171:38:267:315:03
7:24
#11705
25K
15.53 mi13:14:481:56:577:3218:31
7:38
#11571
30K
18.64 mi13:39:152:21:247:3524:27
7:52
#11316
20M
20.00 mi13:50:482:32:577:3911:33
8:30
#11453
21M
21.00 mi13:58:522:41:017:408:04
8:04
#11212
35K
21.75 mi14:04:252:46:347:405:33
7:25
#11068
23M
23.00 mi14:13:572:56:067:399:32
7:37
#10787
24M
24.00 mi14:21:263:03:357:397:29
7:29
#10612
40K
24.85 mi14:27:503:09:597:396:24
7:29
#10430
25.2M
25.20 mi14:30:393:12:487:392:49
8:10
#10348
Finish
26.22 mi14:38:143:20:237:397:35
7:26
#10258
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi134109814981411654(Top 41%)8900(Top 55%)8900(Top 158%)
10K6.21 mi3.10 mi12407+10039354+4609354+46011390(Top 40%)8847(Top 55%)8847(Top 157%)
15K9.32 mi3.11 mi12135+2729187+1679187+16711654(Top 41%)8900(Top 55%)8900(Top 158%)
20K12.43 mi3.11 mi11758+3778979+2088979+20810802(Top 38%)8401(Top 52%)8401(Top 149%)
Half13.11 mi0.68 mi11705+538953+268953+2610824(Top 38%)8449(Top 52%)8449(Top 150%)
25K15.53 mi2.42 mi11571+1348852+1018852+10111016(Top 39%)8386(Top 52%)8386(Top 149%)
30K18.64 mi3.11 mi11316+2558653+1998653+19910413(Top 37%)7890(Top 49%)7890(Top 140%)
20M20.00 mi1.36 mi11453-1378673-208673-2013744(Top 48%)9317(Top 58%)9317(Top 165%)
21M21.00 mi1.00 mi11212+2418519+1548519+1547743(Top 27%)6126(Top 38%)6126(Top 109%)
35K21.75 mi0.75 mi11068+1448431+888431+888057(Top 28%)6342(Top 39%)6342(Top 112%)
23M23.00 mi1.25 mi10787+2818258+1738258+1737338(Top 26%)5778(Top 36%)5778(Top 102%)
24M24.00 mi1.00 mi10612+1758136+1228136+1227572(Top 27%)5861(Top 36%)5861(Top 104%)
40K24.85 mi0.85 mi10430+1828021+1158021+1156733(Top 24%)5290(Top 33%)5290(Top 94%)
25.2M25.20 mi0.35 mi10348+827957+647957+646874(Top 24%)5293(Top 33%)5293(Top 94%)
Finish26.22 mi1.02 mi10258+907878+797878+798770(Top 31%)6324(Top 39%)6324(Top 112%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

11654

Males

8900

M18-39

8900

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

11390

Males

8847

M18-39

8847

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

11654

Males

8900

M18-39

8900

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10802

Males

8401

M18-39

8401

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10824

Males

8449

M18-39

8449

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

11016

Males

8386

M18-39

8386

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

10413

Males

7890

M18-39

7890

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

13744

Males

9317

M18-39

9317

20M→21M

20.0 - 21.0 mi

Top 27%
×8story building
+106ft-24ft

Overall

7743

Males

6126

M18-39

6126

21M→35K

21.0 - 21.8 mi

Top 28%
×7story building
+17ft-86ft

Overall

8057

Males

6342

M18-39

6342

35K→23M

21.8 - 23.0 mi

Top 26%
×5story building
+23ft-63ft

Overall

7338

Males

5778

M18-39

5778

23M→24M

23.0 - 24.0 mi

Top 27%
×6story building
+12ft-82ft

Overall

7572

Males

5861

M18-39

5861

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6733

Males

5290

M18-39

5290

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6874

Males

5293

M18-39

5293

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8770

Males

6324

M18-39

6324

Passing Analysis

Category:
Athletes Passed
3787
Passed By
635
Net Change
+3152
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13410
5K → 10K104239+1003#13410#12407
10K → 15K34169+272#12407#12135
15K → 20K41538+377#12135#11758
20K → Half596+53#11758#11705
Half → 25K22490+134#11705#11571
25K → 30K35398+255#11571#11316
30K → 20M80217-137#11316#11453
20M → 21M2498+241#11453#11212
21M → 35K1484+144#11212#11068
35K → 23M29110+281#11068#10787
23M → 24M18611+175#10787#10612
24M → 40K1908+182#10612#10430
40K → 25.2M842+82#10430#10348
25.2M → Finish12535+90#10348#10258
TOTALS3787635+3152
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing